FE Exam - Civil Engineering Notes 100%
Verified
GeoTech Terms ✔️✔️Dry Unit Weight < Moist Unit Weight < Saturated Unit Weight
Void Ratio
SG * w(moisture content) = Saturation * e(void Ratio)
Total Stress = Effective Stress + Pore Pressure
Buoyant Unit Weight = Sat. Unit Weight - Unit Weight of Water
Permeability Formula ✔️✔️Q = kiA
VOLUME = WEIGHT / UNIT WEIGHT ✔️✔️UNIT WEIGHT = SG X UNIT WEIGHT OF WATER
DRAWING PHASE RELATIONSHIPS AND DIAGRAMS FOR SOIL/SAND VOIDS, VOLUMES, AND
WEIGHTS WILL BE EXTREMELY BENEFICIAL AND HELPFUL ✔️✔️
Shearing Force does not equal Shearing Stress ✔️✔️Shearing Force = T
Shearing Stress = Tau = T/A
Change in Void Ratio is correlated to what is called an COMPRESSION INDEX ✔️✔️
Roughness COEFFICIENT--> Haazen-Williams EQ ✔️✔️Roughness FACTOR - Darcy's EQ
Smaller load causes failure first ✔️✔️When dealing with self-weight, use the centroid
, Method of Sections ✔️✔️Make a cut based on the location of external loads or the loads that you
KNOW. You might want to cut and use a section that doesn't involve the reaction forces
After making the cut, you should probably use a moment. This will involve the external/applied
forces, and then the internal forces from the cuts, which can kinda be looked at as external
forces now. Split these into x- and y-directions after you cut, though
After getting a number or two for some of your unknown forces from the moment, use the sum
of the forces in either the x- or y-direction to solve.
Be smart with your geometry
Shear and Moment diagrams ✔️✔️you really only need these if they ask you for the max value
Principle of Virtual Work (aka the Unit Load Method) ✔️✔️
With Pulley Problems ✔️✔️DRAW A FORCE-BODY DIAGRAM oml
Dry Unit Weight ✔️✔️Weight of Solids / Volume
Force acts at the center of PRESSURE, not at the the centroid ✔️✔️
Uniformity Coefficient vs Coefficient of Gradation ✔️✔️Uniformity Coefficient = D60 / D10
Coefficient of Gradation = (D30^2) / (D60 *D10)
On some soil problems, you could assume the volume is 1 m3 ✔️✔️
Verified
GeoTech Terms ✔️✔️Dry Unit Weight < Moist Unit Weight < Saturated Unit Weight
Void Ratio
SG * w(moisture content) = Saturation * e(void Ratio)
Total Stress = Effective Stress + Pore Pressure
Buoyant Unit Weight = Sat. Unit Weight - Unit Weight of Water
Permeability Formula ✔️✔️Q = kiA
VOLUME = WEIGHT / UNIT WEIGHT ✔️✔️UNIT WEIGHT = SG X UNIT WEIGHT OF WATER
DRAWING PHASE RELATIONSHIPS AND DIAGRAMS FOR SOIL/SAND VOIDS, VOLUMES, AND
WEIGHTS WILL BE EXTREMELY BENEFICIAL AND HELPFUL ✔️✔️
Shearing Force does not equal Shearing Stress ✔️✔️Shearing Force = T
Shearing Stress = Tau = T/A
Change in Void Ratio is correlated to what is called an COMPRESSION INDEX ✔️✔️
Roughness COEFFICIENT--> Haazen-Williams EQ ✔️✔️Roughness FACTOR - Darcy's EQ
Smaller load causes failure first ✔️✔️When dealing with self-weight, use the centroid
, Method of Sections ✔️✔️Make a cut based on the location of external loads or the loads that you
KNOW. You might want to cut and use a section that doesn't involve the reaction forces
After making the cut, you should probably use a moment. This will involve the external/applied
forces, and then the internal forces from the cuts, which can kinda be looked at as external
forces now. Split these into x- and y-directions after you cut, though
After getting a number or two for some of your unknown forces from the moment, use the sum
of the forces in either the x- or y-direction to solve.
Be smart with your geometry
Shear and Moment diagrams ✔️✔️you really only need these if they ask you for the max value
Principle of Virtual Work (aka the Unit Load Method) ✔️✔️
With Pulley Problems ✔️✔️DRAW A FORCE-BODY DIAGRAM oml
Dry Unit Weight ✔️✔️Weight of Solids / Volume
Force acts at the center of PRESSURE, not at the the centroid ✔️✔️
Uniformity Coefficient vs Coefficient of Gradation ✔️✔️Uniformity Coefficient = D60 / D10
Coefficient of Gradation = (D30^2) / (D60 *D10)
On some soil problems, you could assume the volume is 1 m3 ✔️✔️
